I know that this is a dead thread, but it's an appropriate place to post this, and if someone else reads through, maybe it will help.
I have been going out to the course with my wife lately, and trying to put the right discs in her hands. It is an incredible joy to watch her really throw a disc well and learn how to repeat it more often.
Her biggest obstacle is distance of course, even though she can throw a good approach and putt, there are so many people throwing far and she will get quite upset if she can't get some decent D.
She now throws a 140 DX Valk quite well, though it took some technique work and many encouraging words to get this right. She also has a 150 Champ Teebird that an angel gave her in Berkeley last month, as we were playing in severe squalls. She throws this well, but still struggles with it backhand. For sidearm though, it is the perfect disc for her, took her all of 15 minutes to get it right, which I think is all about the rim and grip.
She throws a beat 150 DX shark perfectly straight, though I worry that she gets to seduced by how easy it is for her to keep it level and sometimes uses it to sail way past the hole or from the tee where its pretty line disguises the fact that other discs are giving her more D and coming back to the correct line anyways.
The 148 Champ Eagle we have is too tricky for her at this time.
She also throws a 178 Champ Aero which I find useless, but she can line drive this thing straight due to its understability, and its weight makes it much better midrange for her than a 150.
Tried giving her a 166 Archangel today with mixed results, it should be good to encourage her snap, and was fine for her power, but the nose angles she needed were ellusive. When she saw me use it as a roller though she really got intrigued.
Giving her a putter of her own also helped.
In general, we're finding that having her carry her own discs greatly ups her enthusiasm. She'll take multiple throws to practice things and not feel bashful about asking me for extra discs or to wait for her, she'll just pull another one out and try again. So in our case, having several discs that kind of work is better than just having a couple that she feels she must throw right.